Model stick plane

ABSTRACT

A model stick plane featuring a new assembly of stick fuselage, nose and wing deck support; the nose related to a structure incorporated to the front end of the fuselage to be adapted with a power system and in a shape that varies depending on the type of the power system used; the wing deck support connecting the fuselage; and the wing deck related to a structure essentially provided in relation the hollowed loop structure close to where the center-of-gravity position of the stick fuselage.

FIELD OF THE INVENTION

The present invention is related to an model stick plane, and moreparticularly, to one that overcomes problems of structural variation andits derived variation in angle of incidence of model airplanes whileallowing cost reduction and improved production capacity due to that asingle set of dies can be applied for the production of various fuselageassemblies of model airplane.

BACKGROUND OF THE INVENTION

In terms of flying technology, the present invention taking the factthat model airplane features flying with or without motive force intoconsideration applies the field of air dynamics as the directionalcoordinates in the determination and calibration of thrust line to fendoff with down thrust the longitudinal instability resulted fromexcessive climbing angle due to the speed of flying with power, and withthe side thrust of the thrust line the lateral instability caused by,the torque of the propeller, thus to guide the model airplane for areliable climbing. The down thrust line effects decreases along with theweakening of the power and then disappears upon the termination of powerwithout causing interference to the function of stabilization providedby the tail during the entire process. Accordingly, the model airplaneis allows to demonstrate its expected gliding results after the flyingwith power has turned into flying without power.

To achieve the purpose, the present invention includes a hollowed loopframe support of the main wing deck incorporated with down thrust linetechnology to fully exploit dual advantages of stability and variabilityof the hollowed loop frame support to overcome once for all thoseproblems of structural variation and its derived variation in angle ofincidence among multiple types of model airplanes found with the priorart.

On the aspect of production technology, the dual loop frame support forthe wing deck and the sleeve assembly design for the fuselage of thepresent invention provides the unique function of cutting assembly andaccumulation assembly to allow cost reduction and. improved productioncapacity since a single set of mold can be applied for the production ofvarious fuselage assemblies of model airplane.

SUMMARY OF THE INVENTION

The primary purpose of the present invention is to provide a model stickplane featuring a new assembly of stick fuselage, nose and wing decksupport. The nose relates to a structure incorporated to the front endof the fuselage to be adapted with a power system and in a shape thatvaries depending on the type of the power system used. The wing decksupport connecting the fuselage and the wing deck relates to a structureessentially provided in relation the hollowed loop structure close towhere the center-of-gravity position of the stick fuselage. The stickfuselage, the nose and the wing deck support are respectivelycharacterized as following deck:

1. The body of the stick fuselage relates to a laterally provided H-beamintegrated with a reinforcement of a continuous loop structure eachdisposed at the gaps on both sides of the H-beam. Both loop structureson both sides are staggered to fortify its capability of anti-curvatureand twist stresses as illustrated in FIG. 2 of the accompanying drawingdeck.

2. A spherical dual device is provided in the middle section of the nosefor the assembly of thrust line of the power axis of the model airplane.

3. The wing support having the dual loop structure as its basicconfiguration provides the functions of cutting assembly andaccumulation assembly.

The spherical dual device comprised of two parts, a socket 22 and abearing 24 as illustrated in FIG. 3 provides the direction adjustmentassembly for the power axis for a variety of model airplanes. Theassembly with an optimal angle is made depending on the individual modelof the model airplane.

The wing deck support as illustrated in FIG. 6 are connected to bothends of a fuselage sleeve 35 by means of a dual loop structure 31 incutaway. The dual loop structure 31 is essentially comprised of an upperhollowed loop structure and a lower hollowed loop structure connected toeach other by means of joints from a rectangular support with theirouter ends each disposed with a locking channel 34 of the wing decksupport to be fastened to their matching facilities in symmetry on thewing deck support as illustrated in FIG. 5. The fuselage sleeve 35relates to an insertion type of square tube having both ends connectedto the dual loop structure 31 and also serves as the center-of-gravityposition in relation to the wing deck support 36 for displacement andpositioning purposes.

The basic configuration of the dual loop structure may be applied to abiplane as illustrated in FIG. 1 or to a monoplane when breaking intoeach a single loop structure 33 as illustrated in FIG. 7. The presentinvention by taking advantage of the variation of the dual loopstructure allows the making of any and all indicative propellerairplanes in the history into a model or a toy.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a preferred embodiment of the present inventionapplied in a biplane.

FIG. 2 is a side view showing the structure of the stick fuselagedescribing a basic configuration of a cross-sectional view of a lateralH-beam of the stick fuselage and its reinforcement in a continuous form.

FIG. 3 is a side view showing a construction of a nose of the preferredembodiment of the present invention describing details and work processof a spherical dual device taking a nose operating on an elastic band asan example.

FIG. 4 is a schematic view of another preferred embodiment of thepresent invention providing the supplementary explanation for a noseoperating on a motor.

FIG. 5 is a front view of the present invention showing in conjunctionwith the side view the dual loop structure of the wing deck support ofthe present invention that the dual loop structure is the key members ofthe wing deck support of the present invention.

FIG. 6 is a sectional view of the wing deck support of the presentinvention giving detailed description of the entire construction of itsbasic configuration and its adaptation to a biplane.

FIG. 7 is another preferred embodiment yet of the present inventionadapted in a monoplane describing the configuration of a wing decksupport in a monoplane.

FIG. 8 is another preferred embodiment yet of the present inventionadapted in a triplane describing the configuration of a wing decksupport in a triplane.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIG. 1 for a side view of a preferred embodiment of thepresent invention applied in a biplane, the biplane is selected as therepresentative airplane for the description of the relationship betweenthe present invention and a complete model airplane. Wherein, thepreferred embodiment is essentially comprised of a stick fuselage 1, anose 2, and a wing deck support 3 (refer to FIG. 7 for therepresentative type)

The stick fuselage 1 shows a laterally provided H-beam structure of abody 11 (i.e., the shadowed area in FIG. 2) adapted on its both sideseach a reinforcement of a continuous loop structure 12 (as detailed inFIG. 2); the nose 2 is connected to the front end of the stick fuselage;the nose 2 relates to a spherical dual assembly comprised of two parts,respectively, a semispherical socket 22 and a spherical bearing 24 (asdetailed in FIG. 3); and the wing deck support 3 is incorporated to bothends of a fuselage sleeve 25 by means of two dual loop structures 31 (asdetailed in FIG. 6) before being inserted into the middle section of thestick fuselage 1.

As further illustrated in FIG. 1, two wing deck 36 are respectivelydisposed to the upper and the lower positions of the wing deck support3, and a tail assembly 13 is attached to the rear end of the stickfuselage of the present invention.

FIG. 2 is a side view showing that the stick fuselage 1 has its body 11on both sides respectively adapted with a continuous loop structure 12as reinforcement. Wherein, the dotted line indicates that bothcontinuous loop structures are made in staggered fashion to increase thestructural strength of the fuselage 1 up to the extent sufficient tosupport the rubber torque of the elastic band and the stress from themultiple layers of the wing of various types of model airplanes.

FIG. 3 is a side view showing a construction of a nose of the preferredembodiment of the present invention. Wherein, a square hole is disposedin the rear of the nose 2 to serve as the socket 21 of the fuselage toreceive insertion of the front end of the stick fuselage 1; and asemispherical socket 22 is disposed in front of the nose 2 to constitutea concave and convex dual device with a spherical bearing 24 that allowsfree adjustment of direction. The spherical bearing 24 relates to around tube with its tip made in a shape of a ball and it tailpenetrating through a hole 23 disposed at the bottom of thesemispherical socket 22 and further into the nose to sustain thegyration by a power axis 25. The spherical dual device comprised of thesemispherical socket 22 and the spherical bearing 24 allows thedefinition of the angle of the thrust line needed by the individual typeof the model airplane while gluing the angle together with the sphericalbearing 24 and its rear profile of the round tube inside the nose.

It is to be noted that the preferred embodiment as illustrated in FIG. 3is only applicable to a model airplane operating on a rubber elasticband and that it is also applicable to other type of power system bycertain modification without comprising the characteristics of thepresent invention.

FIG. 4 is a schematic view of another preferred embodiment of thepresent invention providing the supplementary explanation for a noseoperating on a motor. Wherein, the nose is retrofitted into a type of amotor box 26 provided with a concave and convex dual device comprised ofthe semispherical socket 22 at its tail and another semisphericalsurface 28 on the front of a spherical fuselage joint 27 while the tailof the spherical fuselage joint 27 is connected to the stick fuselage 1by means of the fuselage socket 21. The preferred embodiment illustratedin FIG. 4 has the spherical dual device to provide the combination ofthe angle of the thrust line with the motor box 26 and the sphericalfuselage joint 27 for the model airplane as illustrated in FIG. 3.Meanwhile both of the semispherical socket 22 and the semisphericalsurface 28 of the concave and convex dual device are glued in position.

FIG. 5 is a front view of the present invention showing in conjunctionwith the side view the dual loop structure of the wing deck support ofthe present invention that the dual loop structure is the key member ofthe wing deck support of the present invention to elaboratejustification of design and structural variations. The dual loopstructure 31 is comprised of having a rectangular support joint 32 toconnect two individual loop structures; one locking channel 34 is eachdisposed to the upper end and the lower end to join their respectivelyinsertions parts provided on the wing deck support 36 as illustrated inFIG. 6. Wherein, the dual loop structure 31 is made at a certaininclination to meet design requirements of a stagger and wing gap.

The dual loop structure 31 is made of two individual loop structures 33integrated into one piece and given with the design of a hollowed loopstructure to achieve expanded structural benefits with the minimummaterials for supporting the wing deck and stabilizing the incidentalangle of the wing deck while also serving as the passage for the rubberelastic band. Therefore, other than the hollowed loop structure asillustrated, other hollow structures in the shape of an oval,tetragonal, or polygonal shares the same principle of construction.

FIG. 6 is a sectional view of the wing deck support of the presentinvention. Wherein, the wing deck support 3 is comprised of a fuselagesleeve 35 adapted with two dual loop structures 31. The fuselage sleeve35 relates to a square tube to compromise the specification of the stickfuselage having two ends respectively connected with a dual loopstructure 31 at the middle section of the support joint 32. The supportjoint 32 is made in rectangular shape as illustrated in FIG. 5 with itswidth comprising that of the fuselage sleeve 35 and its height reservedwith a space for the adhesion of both dual loop structures to be atdifferent levels to each other for creating the angle of incidence forthe wing deck. Both of the upper and the lower ends of each of both dualloop structures 31 are respectively incorporated to the upper and thelower wing deck 36 by means of the locking channels 34 to become thetype of the biplane illustrated in FIG. 1.

FIG. 7 is another preferred embodiment yet of the present inventionadapted in a monoplane. A dual loop structure 31 is divided into twoindividual loop structures 33 by following the middle line. of thesupport joint 32 illustrated in FIG. 5 respectively incorporated to bothends of the fuselage sleeve 35, and further to the wing deck 36 tobecome the type of the monoplane as illustrated in FIG. 7.

FIG. 8 is another preferred embodiment yet of the present inventionadapted in a triplane. Wherein, the wing deck support for the triplaneis comprised of a combination of four dual loop structures 31 and twofuselage with three wing deck interpolated respectively in the upper,the mid and the lower levels. Though appearing to be somehow complicatedfor three layers of wing deck supports as illustrated, it is in factinvolves two layers of the wing supports illustrated in FIG. 6 that areoverlapped and share the same wing deck.

The present invention significantly upgrade the flying quality of amodel airplane and is particularly in favor of mass production,diversification and popularization to add more fun in flying a modelplane.

1. A model stick plane is comprised of fuselage, nose and wing deck; thestick fuselage having a laterally provided H-beam as its primarystructure with both side gaps reinforced each a continuous structure; aspherical dual device being disposed in the nose to adjust the directionof a power axis; and the wing deck support having a basic configurationof a hollowed dual loop structure that allows cutting assembly andaccumulation assembly.
 2. A model stick plane of claim 1, wherein, theH-beam laterally provided to the cross-section of the fuselage has itsboth side gaps integrated with a continuous reinforcement and bothreinforcements being staggered to improve its capacity foranti-curvature and twist stress.
 3. A model stick plane of claim 1,wherein the spherical dual device in the nose is comprised of a concaveand a convex that allows free adjustment of direction to provide thepower axis to define the orientation of side thrust of the thrust line.4. A model stick plane of claim 3, wherein the spherical dual device inthe nose includes a semispherical socket disposed at the front of thenose, a through hole being disposed at the bottom of the socket; abearing with a spherical tip and a tube tail penetrating into thethrough hole; a spherical dual being defined by the spherical tip of thebearing and the semispherical socket; the tail of the bearingpenetrating into the nose and glued to the nose.
 5. A model stick planeof claim 3, wherein the spherical dual device in the nose furtherincludes a motor box disposed in the front end of the nose toaccommodate a motor; the rear of the motor box is made in asemispherical socket to define a spherical dual device with thesemispherical convex disposed in front of a fuselage joint.
 6. A modelstick plane of claim 1, wherein the wing deck support includes twoindividual hollowed loop structures connected to each other by means ofa rectangular support joint into a hollowed dual loop structure; twohollowed dual structures being respectively incorporated with theirsupport joints to both ends of a square tube fuselage sleeve toconstitute the wing support; and wing deck locking channels beingrespectively disposed to the upper and the lower ends of both holloweddual loop structures for both hollowed dual loop structures to beincorporated to the upper and the lower wing decks for a biplane.
 7. Amodel stick plane of claim 6, wherein the wing deck support furtherincludes two hollowed individual loop structure divided from a holloweddual loop structure along the central line of the rectangular supportjoint; both individual loop structures respectively with their supportjoints incorporated to both ends of the fuselage sleeve into a wing decksupport, and further into the wing deck by means of the lockingchannels.
 8. A model stick plane of claim 6, wherein the wing decksupport further includes four hollowed dual loop structures connected inthe fashion of two dual accumulation; and respectively with theirsupport joints to incorporate to both ends of two fuselage sleeves todefine a three-layer wing deck support interpolated incorporation intoupper, mid, and lower levels to those wing deck locking channels for theassembly of the three layers of wings.
 9. A model stick plane of claim6, wherein the loop structure of the individual hollowed loop structureand the hollowed dual loop structure for the wing deck support includeshollowed round loop structure, hollowed oval loop structure, hollowedtetragonal loop structure and hollowed polygonal loop structure.